Apparatus for manufacturing paper



Filed Oct. 51, 1928 ATTORNEYS.

Patented Mar. 25, 1930 roM HARVEY, or MIDDLETOWN, onro APPARATUS FOR MANUFACTURING PAPER Application filed October 31, 1928. Serial No. 316,276.

My invention relates broadly to the paper making art, and specifically to a novel process for determining the width of a paper web during its formation by means of shower deckles in which the vat solution is used instead of fresh water.

p In the prior art it has long been suggested that a simple. means for controlling the width of the sheet is by the provision of spray of fresh water so directed at the side edges of the sheet as to wash away the pulp leaving a definite edge. Cronk, in his Patent No. 152,216, issued June 23, 1874:, shows such an arrangement, and this patentee further suggests the use of adjustable sprays which will permit the position of the application of the spray to be changed so that the width of the sheet may be varied.

Cronk and all the other patentees who have provided different modifications of his original idea used fresh water. This has led to many difliculties. In the first place, to keep the pulp Within the feed box or vat in proper condition it is necessary to maintain the mass of pulp at a proper acidity as determined ordinarily by a pH test. If shower deckles using fresh water are used, the strength of the solution is being constantly varied, which affects the acidity of the pulp in the vat. Further, the more fresh water which is added, the more water which needs to be removed from the pulp.

It is the object of my invention to provide a shower deckle which will permit the water or solution which is withdrawn from within the cylinder mold to be used again to define the border edges of specifically my object to provide preferably an adjustable shower deckle which will be so constructed that it will not tend to block up.

The above and other advantages in the simplicity of the arrangement and mechanical construction of the shower deckle which I propose to use, I accomplish by that certain combination and arrangement of parts of which I have shown a preferred embodiment. In the drawings z- Figure 1 is a side elevation of my preferred type of shower deckle.

Figure 2 is an end elevation of the deckle the web. It is further nozzle showing the dischar produces a confined sheet-like sp Figure 3 is a plete assembly shown in Figure Figure 4 is a ray. 11 end elevation of the diagrammatic view sho how my process may be carried out.

t to the diagram. in Figure 4,

Referring firs I have indicate dth cylinder 2 having a cylindrical wall of so like material 3 through which the pulp tion is withdrawn,

outer surface of the felt. The g pulley,

the

ge passage which comwing

e pulp vat at 1 with a reensoluleaving the pulp on the screen to be picked up by eneral arrangement of cylinder mold illustrated is that which is known in the art.

The cylinder may be driven by a suitable well and the ends 4. of the cylinder have a 1pipe connection 5 to permit the solution to e pumped away from within the cylinder by a pump 6 having a delivery pipe 7. From the pipe 7 pipes 8 and 9 extend to the shower deckles, one at each end of the cylinder.

My shower deckle is composed of an outer tubular member 10 within which an inner pipe section 11 is adjustably secured. A

has a slot 15 therein which may, be one eighth inch wide and ends, has straight walls 16. T lar member has a boss 17 within of an adjustment bolt 17 is secured.

adjustment bolt through an ape formed in a hou the exterior of the pipe bolt is provided with a ing of which moves the with relation to the inner pipe.

supplied to the which is secured to the end of pipe 11.

rture in a boss 18 whi for example, which, at the he outer tubuwhich the end The extends from the boss 17 ch is sing 19 which is mounted on deckle through a b 10. The adjustment wing nut 17, the turnouter tubular member Liquid is ushing 20 the inner I have further shown a boss 21 formed on the housing 19 which may, as indicated vide an attachm be supported. through the busl ent by which the deckle promay As the liquid is pumped ling into the pipe 11 it p asses to the open end 21 of the pipe. Passing out the open end of the pipe, the flow of the liquid is directed downwardly to the nozzle slot which, being of suitable length, causes the liquid to be ejected in a solid sheet instead of a splashing spray-like formation.

In Figure 1 I have indicated the cylinder mold at 2 with the web forming thereon at 22. The sheet of liquid which determines the edge of the web is indicated at 23. It will be apparent that when it is desired to make the paper web narrower all that needs to be done is to turn the wing nut and the casing 10 will be moved to the left as indicated, thereby forming a wider sheet of water which will mpve the edge of theweb also further to the le t.

Modifications in the particular type of deckle which I have disclosed will occur to those skilled in the art. As far as I am aware no one has previously utilized a nozzle having a discharge orifice of such size that the exhausted liquor from the vat might be used for a shower deckle. It will be apparent that should a nozzle with fine spray holes be used that the holes would almost immediately become blocked up.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A shower deckle comprising an outer tubular member slidably mounted on an inner tubular member, said inner tubular member having an open end, said outer tubular member having a nozzle with an elongated discharge passage therein, and means for supplying liquid to said inner member.

2. A shower deckle comprising an outer tubular member slidably mounted on an inner tubular member, said inner tubular member having an open end, said outer tubular member having a nozzle with an elongated discharge passage therein, and means for supplying liquid to said inner member, and means for regulating the position of the outer tube with relation tothe inner tube.

3. A shower deckle comprising an outer" tubular member slidably mounted on an inner tubularmember, said inner tubular member having an open end, said outer tubular member having a nozzle with an elongated discharge passage therein, and means forsupplying liquid to said inner member, the .extent of said discharge passage being greater than the range of movement of said outer member.

4. In combination, a shower deckle having a tubular outer body having an extension within which an elongated slot is formed which provides a discharge nozzle, an inner v tubular member having an open end through which liquid is forced, a packing gland between the outer body and inner tubular member, and means for causing relative movement between the outer body and inner member.

5. In combination, a shower deckle having a tubular outer body having an extension within which an elongated slot is formed.

which provides a discharge nozzle, an inner tubular member having an open end through which liquid is forced, a packing gland-be- .tween the outer body and inner tubular member, and means for causing relative movement between the outer body and inner member, the slotted portion of said extension controlling the extent of the spray in accordance with the position of the end of said inner tubular member.

TOM HARVEY. 

